Don't install postmaster symlink anymore

This has long been deprecated.  Some of the build systems didn't even
install it.

Also remove man page.

Reviewed-by: Karl O. Pinc <kop@karlpinc.com>
Discussion: https://www.postgresql.org/message-id/flat/ece84b69-8f94-8b88-925f-64207cb3a2f0@enterprisedb.com

doc/src/sgml/ref/allfiles.sgml

@@ -219,7 +219,6 @@ Complete list of usable sgml source files in this directory.
 <!ENTITY pgupgrade          SYSTEM "pgupgrade.sgml">
 <!ENTITY pgwaldump          SYSTEM "pg_waldump.sgml">
 <!ENTITY postgres           SYSTEM "postgres-ref.sgml">
-<!ENTITY postmaster         SYSTEM "postmaster.sgml">
 <!ENTITY psqlRef            SYSTEM "psql-ref.sgml">
 <!ENTITY reindexdb          SYSTEM "reindexdb.sgml">
 <!ENTITY vacuumdb           SYSTEM "vacuumdb.sgml">

doc/src/sgml/ref/postmaster.sgml

@@ -1,44 +0,0 @@
-<!--
-doc/src/sgml/ref/postmaster.sgml
-PostgreSQL documentation
--->
-
-<refentry id="app-postmaster">
- <indexterm zone="app-postmaster">
-  <primary>postmaster</primary>
- </indexterm>
-
- <refmeta>
-  <refentrytitle><application>postmaster</application></refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo>Application</refmiscinfo>
- </refmeta>
-
- <refnamediv>
-  <refname>postmaster</refname>
-  <refpurpose><productname>PostgreSQL</productname> database server</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
-  <cmdsynopsis>
-   <command>postmaster</command>
-   <arg rep="repeat"><replaceable>option</replaceable></arg>
-  </cmdsynopsis>
- </refsynopsisdiv>
-
- <refsect1>
-  <title>Description</title>
-
-  <para>
-   <command>postmaster</command> is a deprecated alias of <command>postgres</command>.
-  </para>
- </refsect1>
-
- <refsect1>
-  <title>See Also</title>
-
-  <para>
-   <xref linkend="app-postgres"/>
-  </para>
- </refsect1>
-</refentry>

doc/src/sgml/reference.sgml

@@ -289,7 +289,6 @@
    &pgupgrade;
    &pgwaldump;
    &postgres;
-   &postmaster;
 
  </reference>